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Feb. 17, 2026

Muscle loss and dementia

Elizabeth Dominguez, PA

Medically reviewed by:
Elizabeth Dominguez, PA

Muscle loss and dementia often show up around the same time, but there’s a lot you can do to slow both down. It doesn’t take a big overhaul — just small, steady habits that fit into your life.

Getting older brings changes you can feel in both your body and mind. Tasks that once seemed simple — like climbing stairs or carrying laundry — can take a little more effort. Maybe you occasionally forget a name or misplace your glasses. These moments are part of aging, but they also remind you how closely your physical strength and memory are connected.

Studies suggest that changes in your muscles and your brain may be linked. When one starts to weaken, the other can be affected too.1 Understanding this connection can help you take small, practical steps to protect both your strength and your memory.

What dementia is and why it happens

Dementia isn’t one single disease. It’s a group of conditions that affect memory, thinking and behavior. You might find it harder to plan, make choices, talk with others or handle daily tasks. Alzheimer’s disease is the most common form, but there are several others.2

The brain uses billions of nerve cells, known as neurons, to send and receive messages. Over time, protein buildup, inflammation or poor circulation can damage these cells. Health issues like high blood pressure, diabetes and obesity can damage blood vessels. This affects oxygen flow to the brain and raises the risk of dementia.

Age and genetics play a big part, but lifestyle matters, too. Staying active, eating well and engaging your mind help protect your brain health as you age.

Muscle loss and aging

As people get older, their bodies naturally change, and one of the most significant changes happens in their muscles. Around age 50, most adults begin to lose a small percentage of muscle each year. This gradual loss, known as sarcopenia, weakens muscles over time, making it harder to maintain balance and movement.3

Sarcopenia doesn’t happen all at once. It develops slowly and becomes more common with each decade. Between the ages of 60 and 70, about one in ten adults is affected. After age 80, nearly half of adults experience significant muscle loss.

What makes this decline more than a strength issue is how deeply muscles affect the rest of your body. Skeletal muscles do more than move your limbs — they help regulate hormones, blood sugar and inflammation. They also release myokines, which are natural proteins that travel through your bloodstream to support organs, including those involved in cognitive health.4

When muscle mass decreases, the body makes fewer of these protective signals. This can trigger changes like:

Higher blood sugar levels

Muscles help store and use glucose. With less muscle, your body may become less sensitive to insulin.

More inflammation

Myokines help manage inflammation. When their levels drop, low-grade inflammation can rise.

Less nerve and brain support

Certain myokines protect and repair brain cells, so losing muscle may reduce that natural defense.

Even slight declines in leg or hip strength can affect balance and walking speed. To check for sarcopenia, your doctor might test grip strength, walking pace or how many times you can stand up from a chair in 30 seconds.

Muscle loss is common with age. Staying active, eating a balanced diet and managing chronic conditions can slow the process and help protect your overall health, including your mind.

How muscle loss and dementia are connected

Scientists are learning more about how muscle loss and dementia may be linked. People who lose muscle or strength as they age are more likely to notice changes in memory, focus and problem-solving.

A study featured in JAMA Network Open found that older adults who lost more muscle over time also experienced a greater decline in thinking and decision-making skills compared to those who maintained their strength.5

What’s more, a separate study in Frontiers in Aging Neuroscience found that people with weaker grip strength were more likely to develop dementia, suggesting a strong connection between muscle health and brain health.6

Experts believe this connection may come from changes that affect both your muscles and your brain, like inflammation, lower hormone levels and reduced blood flow. The good news is that you can take steps to protect both. Staying active, eating enough protein and keeping your body strong can also help your mind stay sharp.

Shared pathways

Your muscles and brain depend on many of the same systems to stay healthy — oxygen, nutrients and steady blood flow. When muscles begin to shrink, metabolism slows and circulation may not work as efficiently. This can reduce the oxygen and nutrients your brain cells need to stay active and alert.

The role of physical activity

Staying active keeps your muscles strong and supports your brain. When you move, your body releases a protein called brain-derived neurotrophic factor (BDNF). This protein helps brain cells grow, repair and communicate more effectively.7 Regular activity also improves blood flow, lowers blood pressure and promotes better sleep, all of which help protect memory and thinking skills.

When activity slows down, the opposite tends to happen. Weak muscles make movement more complicated, leading to less exercise and fewer of the brain-protective signals your body produces. Over time, this cycle can speed up both muscle loss and cognitive decline.

How to prevent muscle loss as you age

You can’t stop aging, but you can slow how it affects your muscles and your mind. Small, consistent steps make a big difference.

Stay active

Regular movement is the most effective way to keep your muscles strong. The Centers for Medicare & Medicaid Services (CMS) recommends at least 150 minutes of moderate activity each week.8 This can include brisk walking, swimming, dancing or even gardening — anything that keeps you moving and your heart rate up.

Build strength

Resistance training helps rebuild and maintain muscle. You can use your own body weight, resistance bands or light hand weights. These exercises also support balance and bone health. Try starting with simple moves like:

  • Sitting and standing from a chair
  • Wall push-ups
  • Calf raises
  • Light bicep curls

Aim for two short strength sessions each week, leaving a day or two in between for your muscles to recover.

Focus on balance and flexibility

Gentle exercises like tai chi, yoga or stretching can improve coordination and reduce the risk of falls. Even a few minutes a day can make movements feel steadier and more natural.

Prioritize sleep

Muscles repair and grow during rest. Getting seven to eight hours of quality sleep each night supports both muscle recovery and memory processing. This will give your body and brain time to recharge.

How to safely begin a muscle-strengthening plan

If you’re new to exercise, start slow and set goals that fit your comfort level. Building strength takes time, but small steps add up quickly.

Talk with your doctor

Before starting any exercise routine, check in with your health care provider — especially if you have heart, joint or balance concerns.

Warm up for five minutes

Gentle marching in place or light stretching helps your body prepare and lowers the risk of injury.

Begin with body weight

Try simple moves like sit-to-stand exercises or wall push-ups to build confidence and strength.

Add resistance gradually

Once you feel steady, introduce small hand weights or resistance bands to make muscles work a bit harder.

Focus on form

Slow, controlled movements are safer and more effective than quick repetitions.

Rest between sessions

Muscles grow and repair during recovery, so take breaks to prevent strain and fatigue.

Even ten minutes a day can make a difference. Over time, you may notice better balance, higher energy and a sharper mind.

Add more protein to your diet

Protein is your body’s main building material for muscle repair. As people age, their bodies become less efficient at using protein, so they need more to stay strong.

Experts suggest getting 1.0 to 1.2 grams of protein per kilogram of body weight each day. For someone who weighs 150 pounds (about 68 kilograms), that’s roughly 68 to 82 grams daily.9

Good protein sources include:

  • Chicken, turkey or lean beef
  • Fish, especially salmon or tuna
  • Eggs
  • Dairy products like milk, yogurt or cottage cheese
  • Beans, lentils, tofu and soy-based foods
  • Nuts and seeds

Try spreading protein throughout the day; having a serving at each meal helps your body use it more effectively. If you find it hard to meet your daily needs, talk with your doctor about whether a protein shake or supplement could help. If you have chronic kidney disease (CKD), always discuss with your doctor first about increasing your protein intake, as some patients with CKD should be on a reduced protein diet.

Putting it all together

Muscle loss and dementia often show up around the same time, but there’s a lot you can do to slow both down. It doesn’t take a big overhaul — just small, steady habits that fit into your life.

Pay attention to how your body feels. Maybe climbing stairs takes more effort, or carrying groceries feels heavier than it used to. These are early signs that your muscles may be getting weaker. Bring it up with your doctor during your next visit and ask about simple strength or balance checks. If you’re on Medicare, your yearly wellness visit includes both physical and memory screenings, providing a good opportunity to discuss any changes.10

Keeping up with movement, eating enough protein and seeing your provider regularly can go a long way. Together, these steps help you stay stronger, steadier and mentally sharp as the years go by.

Key points to remember

  • Muscle and brain health are closely linked.
  • When muscle loss affects hormones, circulation and inflammation, it can also affect memory and thinking.
  • Exercise and protein-rich foods help maintain strength and slow decline.
  • Strength training supports memory by encouraging the release of protective brain chemicals.
  • b The best results come from consistency — move a little more, eat well and keep at it.

Your strength supports more than movement. It supports your independence, confidence and memory. Each step, stretch and healthy choice helps your body and mind stay active for years to come.

References

Conditions & diseases Articles